1994 GMC Suburban Owner's Manual - Page 339

Selecting the Proper Maintenance Schedule Here is how to tell which schedule to followonce you find the proper maintenance chart to use. MAINTENANCE SCHEDULEI Is any one of these true for your vehicle? 0 0 Most trips are less than 4 miles (6 kilometers.) Most trips are less than 10 miles (1 6 kilometers), and the outside temperatures arebelow freezing. The engine is at low speed most of the time (as in door-to-door delivery, stop-and-go traffic, or commercial use). 0 You operate in dusty areas or off-road frequently. You tow a trailer. If any one (or more) of these is true for your driving, followSchedule I. Schedule I is shown by a plus sign (+) on the chart. MAINTENANCE SCHEDULEI1 Follow Schedule I1 ONLY if none of the above conditions aretrue. Schedule I1 is shown by a dot ( 0 ) on the chart. 7-5